main.rs

#[macro_use]
extern crate log;

// To import all needed traits.
use gio::prelude::*;
use gtk::prelude::*;

use std::env;

fn main() {
    env_logger::init();
    let uiapp = gtk::Application::new(
        Some("org.gtkrsnotes.demo"),
        gio::ApplicationFlags::FLAGS_NONE,
    )
    .expect("Application::new failed");

    uiapp.connect_activate(|app| {
        // We create the main window.
        let win = gtk::ApplicationWindow::new(app);

        // Then we set its size and a title.
        win.set_default_size(320, 200);
        win.set_title("Basic example");

        win.connect_draw(|win_self, ctxt| {
            info!("Obtained context");

            ctxt.set_source_rgb(0.0, 0.0, 0.0);
            ctxt.rectangle(0.0, 0.0, 5.0, 30.0);
            ctxt.fill();
            ctxt.stroke();
            ctxt.paint();

            Inhibit(false)
        });

        println!("Showing all");
        // Don't forget to make all widgets visible.
        win.show_all();
    });
    uiapp.run(&env::args().collect::<Vec<_>>());
}